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The Waikato Environment for Knowledge Analysis (WEKA), a machine learning workbench. This is the stable version. Apart from bugfixes, this version does not receive any other updates.

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/*
 *   This program is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program.  If not, see .
 */

/*
 * PropertyHandler.java
 * Copyright (C) 2004-2012 University of Waikato, Hamilton, New Zealand
 */

package weka.core.xml;

import java.util.Enumeration;
import java.util.HashSet;
import java.util.Hashtable;

import weka.core.RevisionHandler;
import weka.core.RevisionUtils;

/**
 * This class stores information about properties to ignore or properties that
 * are allowed for a certain class.
 * 
 * @author FracPete (fracpete at waikato dot ac dot nz)
 * @version $Revision: 11247 $
 */
public class PropertyHandler implements RevisionHandler {

  /**
   * contains display names of properties to ignore in the serialization process
   * 
   * @see #ignored()
   * @see #addIgnored(String)
   * @see #removeIgnored(String)
   * @see #isIgnored(String)
   */
  protected Hashtable> m_Ignored = null;

  /**
   * lists for a class the properties allowed to use for setting and getting. if
   * a class is not listed, then all get/set-methods are allowed.

   * Mapping: classname (String) - properties (HashSet, containing the
   * Property-Names)
   * 
   * @see #allowed()
   * @see #addAllowed(Class,String)
   * @see #removeAllowed(Class,String)
   * @see #isAllowed(Class,String)
   */
  protected Hashtable> m_Allowed = null;

  /**
   * initializes the handling
   */
  public PropertyHandler() {
    super();

    m_Ignored = new Hashtable>();
    m_Allowed = new Hashtable>();
  }

  /**
   * returns an enumeration of the stored display names and classes of
   * properties to ignore.

   * NOTE: String and Class Objects are mixed in this enumeration,
   * depending whether it is a global property to ignore or just one for a
   * certain class!
   * 
   * @return the display names and classes
   * @see #m_Ignored
   */
  public Enumeration ignored() {
    return m_Ignored.keys();
  }

  /**
   * adds the given display name of a property to the ignore list. Can either be
   * a complete path (e.g. __root__.options) or only a property
   * name (e.g. options). In the latter case it matches all
   * occurences of this display name.
   * 
   * @param displayName the property to ignore
   * @see #m_Ignored
   */
  public void addIgnored(String displayName) {
    HashSet list;

    list = new HashSet();
    list.add(displayName);

    m_Ignored.put(displayName, list);
  }

  /**
   * adds the given class with the display name of a property to the ignore
   * list. I.e. this property is only ignored for this class.
   * 
   * @param c the class for which a property is to be ignored
   * @param displayName the property to ignore
   * @see #m_Ignored
   */
  public void addIgnored(Class c, String displayName) {
    HashSet list;

    // retrieve list
    if (m_Ignored.containsKey(c)) {
      list = m_Ignored.get(c);
    } else {
      list = new HashSet();
      m_Ignored.put(c, list);
    }

    list.add(displayName);
  }

  /**
   * removes the given display name from the ignore list. returns whether the
   * removing was succesful, i.e. whether the display name was in the list.
   * 
   * @param displayName the property to remove from the ignore list
   * @return whether the ignore list contained the specified property
   * @see #m_Ignored
   */
  public boolean removeIgnored(String displayName) {
    return (m_Ignored.remove(displayName) != null);
  }

  /**
   * removes the given display name from the ignore list of the class. returns
   * whether the removing was succesful, i.e. whether the display name was in
   * the list.
   * 
   * @param c the class to remove the property from
   * @param displayName the property to remove from the ignore list
   * @return whether the ignore list contained the specified property
   * @see #m_Ignored
   */
  public boolean removeIgnored(Class c, String displayName) {
    HashSet list;

    // retrieve list
    if (m_Ignored.containsKey(c)) {
      list = m_Ignored.get(c);
    } else {
      list = new HashSet();
    }

    return list.remove(displayName);
  }

  /**
   * checks whether the given display name is an ignored property
   * 
   * @param displayName the property to check whether it is on the ignore list
   * @return whether the property is in the ignored list
   * @see #m_Ignored
   */
  public boolean isIgnored(String displayName) {
    return m_Ignored.containsKey(displayName);
  }

  /**
   * checks whether the given display name of a certain class is an ignored
   * property. It only checks for this certain class and no derivative classes.
   * If you also want to check for derivative classes, use
   * isIgnored(Object,String).
   * 
   * @param c the class to check the property for
   * @param displayName the property to check whether it is on the ignore list
   * @return whether the property is in the ignored list
   * @see #m_Ignored
   * @see #isIgnored(Object, String)
   */
  public boolean isIgnored(Class c, String displayName) {
    HashSet list;

    // retrieve list
    if (m_Ignored.containsKey(c)) {
      list = m_Ignored.get(c);
    } else {
      list = new HashSet();
    }

    return list.contains(displayName);
  }

  /**
   * checks whether the given display name of a given object is an ignored
   * property. The object is checked for each stored class whether it is an
   * instanceof. If the class is not stored then it will default to
   * false, since there are no restrictions for this class.
   * 
   * @param o the object to check the property for
   * @param displayName the property to check whether it is on the ignore list
   * @return whether the property is in the ignored list
   * @see #m_Ignored
   */
  public boolean isIgnored(Object o, String displayName) {
    Enumeration enm;
    Class c;
    Object element;
    boolean result;
    HashSet list;

    result = false;

    enm = ignored();
    while (enm.hasMoreElements()) {
      element = enm.nextElement();

      // has to be class! not a display name
      if (!(element instanceof Class)) {
        continue;
      }

      c = (Class) element;

      // is it an instance of this class?
      if (c.isInstance(o)) {
        list = m_Ignored.get(c);
        result = list.contains(displayName);
        break;
      }
    }

    return result;
  }

  /**
   * returns an enumeration of the classnames for which only certain properties
   * (display names) are allowed
   * 
   * @return the classnames with restriction to properties
   */
  public Enumeration allowed() {
    return m_Allowed.keys();
  }

  /**
   * adds the given property (display name) to the list of allowed properties
   * for the specified class.
   * 
   * @param c the class to add a property for
   * @param displayName the property to allow for the class
   * @see #m_Allowed
   */
  public void addAllowed(Class c, String displayName) {
    HashSet list;

    // retrieve list
    list = m_Allowed.get(c);
    if (list == null) {
      list = new HashSet();
      m_Allowed.put(c, list);
    }

    // add property
    list.add(displayName);
  }

  /**
   * removes the given property (display name) for the specified class from the
   * list of allowed properties.
   * 
   * @param c the class to remove the property for
   * @param displayName the property to remove
   * @return whether the property was found
   * @see #m_Allowed
   */
  public boolean removeAllowed(Class c, String displayName) {
    boolean result;
    HashSet list;

    result = false;

    // retrieve list
    list = m_Allowed.get(c);

    // remove property
    if (list != null) {
      result = list.remove(displayName);
    }

    return result;
  }

  /**
   * returns whether the given property (display name) is allowed for the given
   * class. It only checks for this certain class and no derivative classes. If
   * you also want to check for derivative classes, use
   * isAllowed(Object,String).
   * 
   * @param c the class to check the property for
   * @param displayName the property (display name) to check
   * @return whether the property is allowed in that context
   * @see #m_Allowed
   * @see #isAllowed(Object, String)
   */
  public boolean isAllowed(Class c, String displayName) {
    boolean result;
    HashSet list;

    result = true;

    // retrieve list
    list = m_Allowed.get(c);

    // check list
    if (list != null) {
      result = list.contains(displayName);
    }

    return result;
  }

  /**
   * returns whether the given property (display name) is allowed for the given
   * object . The object is checked for each stored class whether it is an
   * instanceof. If the class is not stored then it will default to
   * true, since there are no restrictions for this class.
   * 
   * @param o the object to check the property for
   * @param displayName the property (display name) to check
   * @return whether the property is allowed in that context
   */
  public boolean isAllowed(Object o, String displayName) {
    Enumeration enm;
    Class c;
    boolean result;
    HashSet list;

    result = true;

    enm = allowed();
    while (enm.hasMoreElements()) {
      c = (Class) enm.nextElement();

      // is it an instance of this class?
      if (c.isInstance(o)) {
        list = m_Allowed.get(c);
        result = list.contains(displayName);
        break;
      }
    }

    return result;
  }

  /**
   * Returns the revision string.
   * 
   * @return the revision
   */
  @Override
  public String getRevision() {
    return RevisionUtils.extract("$Revision: 11247 $");
  }
}
    

    

    

                
 
            

    

                
 
            



    
    






    
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